Ordinary level 2025 North West regional mock chemistry 1

Ordinary level 2025 North West regional mock chemistry 1

Ordinary level 2025 North West regional mock chemistry 1

what is the product fonned nt the anode
A. Hydrogen gas
D, Oxygon gas
C. Copper metal
D. Sulphur dioxide _ _
JlTwhlch of the following elements exists in nature a3 a
diatomic molecule?
A. carbon
B. Oxygen
C. phosphorus
D. Magnesium __
22. Stale what happens when calcium carbonate is treated
with dilute hydrochloric acid.
A. effervescence occurs and oxygen gas is released
B. effervescence occurs and carbon dioxide gas is
released
C. white misty fumes are observed
D. a white precipitate is formed
23. An exothermic reaction can be defined as
A , A reaction that releases heat energy
B; A reaction that absorbs heat energy
C. A reaction that occurs ai constant temperature
A reaction that occurs at constant pressure
24. , What is tne effect of carbon dioxide gas on a candle
flame?
rv. a uur113 with a pop sound
B. It causes the flame to bum brighter
C. It puts out the flame
D. It decreases the size of the flame
QUESTIONS 25–27
INS rRUCTIONS: For each of the following questions, one
or more of the responses) given is (are) correct. Decide
which response(s) is (are) correct.
Then choose
28. IJy which of the following process do plants tne
carbon dioxide?
A. Respiration
B. Photosynthesis
C. Combustion
IX Decomposition
29. . Identify a properly which is characteristic of halogen”
A. They exist as solids, liquids and gases at room
temperature
B. They have high melting and boiling points
C. Ihey do not react with non–metals
D, They arc electrolytes
30. What is the name of the species formed when an atom
gains one or more electrons?
A. A cation
B. A radical
C. An anion
D. A molecule
31. Which homologous series below reacts with carboxylic
acids to produce esters?
A. Alkenes
B. Alcohols
C. Alkanes
D. Alkynes
32. . What kind of reaction takes place when meuhane is
reacted with chlorine in the presence of sunlight?
A. Substitution reaction
B. Combustion reaction
C Elimination reaction
D. Dehydration reaction
33. One of the following is NOT a precaution taken when
determining the heat of combustion of cthanoL
A. Close the spirit lamp tightly to prevent evaporation
of ethanol
B. Stir the water constantly fci even distribution of
heat
C. Use a wind shield to prevent the flame from beir
put out ^
D. Take out the thermometer from time to time to
properly read and recent the temperature me
34. A suiphhe reacts with dilute hydrochloric acid to
produce a gas. The gas produced is:
A. Sulpliurdroxide
B. Chlorine gas
c TTvHrnn^n nsc
A–
., qui^nui U 1VAIU\.
35. Which of the follow ing oxides dissolve in water to
produce a solution whose P4 value is greater than 7?
A. C02
r> >.irv
u > ov/i
C. S03
D. Na20
A. If 1
, 2 and 3 arc correct
B. If 1 and 3 are correct
C. If 2 and 4 are correct
rv LS. ic 11 only 4 is correct
Instructions summarized
A B C D
1 ,2,3 only 1,3 only 2,4 only 4 only
25. Which of the following is (are) an examples) of a giant
,atomic crystal?
A. Diamond
1WW
C. Graphite
D. Sodium Chloride
26. Which of the following gas (es) is (are) responsible for
global warming?
A. Sulphur dioxide
B. Carbon dioxide
C Hydrogen
D. Methane
27. The rate of the reaction
r 1 y i/1 r%. « # 1 1

Would NOT be influenced by
A. Temperature
B. Surface area
C. Concentration
D. Pressure
QUESTIONS 36–38
INSTRUCTIONS: Each of the following questions consists
of a statement in the left–hand column followed by a second
statement in the right–liand culuxim. Decide whether each of
the statements is True or False. Then on your answer sheet,
choose
A
A. If both statements are True and the second
Statement is a correct explanation of the first
B. If both statements are True but the second
statement is not the correct explanation of the first
C. If the first statement is True but the second
statement is False
D. If the first statement is False but the second
statement is True
* ©This TRWRPI document /05Iis 5 the PI /MOCK property 2025 of the THU and the Inspectorate of Pedagogy and should no